温度对杉木林土壤呼吸的影响(英文)

被引:11
作者
郭剑芬 [1 ,2 ]
杨玉盛 [1 ]
刘乐中 [1 ]
赵月彩 [1 ]
陈增文 [1 ]
毛艳玲 [3 ]
机构
[1] 湿润亚热带生态地理过程省部共建教育部重点实验室,福建师范大学地理科学学院
[2] 福建师范大学地理学博士后流动站
[3] 福建农林大学资源与环境学院
关键词
森林土壤; 杉木; 土壤呼吸; 温度;
D O I
暂无
中图分类号
S714.5 [森林土壤分析];
学科分类号
0903 ; 090301 ;
摘要
本文通过室内90天培养实验,研究了不同温度(15℃、25℃和35℃)对福建南平88年生杉木林(Cunninghamia lanceolata)土壤(0-10cm)呼吸的影响。结果表明,土壤CO,释放速率随培养时间和培养温度发生明显变化。在15℃,25℃,35℃下,土壤平均呼吸速率和累积呼吸量逐渐增高,在35℃达到最高。培养初期(第2天)和末期(第90天),土壤Q10值(温度系数)差异明显。培养期温度范围为15-25℃时土壤Q10平均值为2.0,而当温度范围为25~35℃时,Q10平均值为1.2。整个培养过程中土壤呼吸速率一般随培养时间延长而递减。培养90天后土壤累积呼吸释放的碳量较低,它与培养前土壤初始碳量的比值小于10%。
引用
收藏
页码:49 / 53+93 +93
页数:6
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